Lateralization of word and face processing in developmental dyslexia and developmental prosopagnosia
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Lateralization of word and face processing in developmental dyslexia and developmental prosopagnosia. / Gerlach, Christian; Kühn, Christina D.; Poulsen, Mads; Andersen, Kristian Bjerre; Lissau, Cathrine Heikamp; Starrfelt, Randi.
I: Neuropsychologia, Bind 170, 108208, 06.2022.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Lateralization of word and face processing in developmental dyslexia and developmental prosopagnosia
AU - Gerlach, Christian
AU - Kühn, Christina D.
AU - Poulsen, Mads
AU - Andersen, Kristian Bjerre
AU - Lissau, Cathrine Heikamp
AU - Starrfelt, Randi
PY - 2022/6
Y1 - 2022/6
N2 - In right-handed adults, face processing is lateralized to the right hemisphere and visual word processing to the left hemisphere. According to the many-to-many account (MTMA) of functional cerebral organization this lateralization pattern is partly dependent on the acquisition of literacy. Hence, the MTMA predicts that: (i) processing of both words and faces should show no or at least less lateralization in individuals with developmental dyslexia compared with controls, and (ii) lateralization in word processing should be normal in individuals with developmental prosopagnosia whereas lateralization in face processing should be absent. To test these hypotheses, 21 right-handed adults with developmental dyslexia and 21 right-handed adults with developmental prosopagnosia performed a divided visual field paradigm with delayed matching of faces, words and cars. Contrary to the predictions, we find that lateralization effects in face processing are within the normal range for both developmental dyslexics and prosopagnosics. Moreover, the group with developmental dyslexia showed right hemisphere lateralization for word processing. We argue that these findings are incompatible with the specific predictions of the MTMA.
AB - In right-handed adults, face processing is lateralized to the right hemisphere and visual word processing to the left hemisphere. According to the many-to-many account (MTMA) of functional cerebral organization this lateralization pattern is partly dependent on the acquisition of literacy. Hence, the MTMA predicts that: (i) processing of both words and faces should show no or at least less lateralization in individuals with developmental dyslexia compared with controls, and (ii) lateralization in word processing should be normal in individuals with developmental prosopagnosia whereas lateralization in face processing should be absent. To test these hypotheses, 21 right-handed adults with developmental dyslexia and 21 right-handed adults with developmental prosopagnosia performed a divided visual field paradigm with delayed matching of faces, words and cars. Contrary to the predictions, we find that lateralization effects in face processing are within the normal range for both developmental dyslexics and prosopagnosics. Moreover, the group with developmental dyslexia showed right hemisphere lateralization for word processing. We argue that these findings are incompatible with the specific predictions of the MTMA.
KW - Developmental dyslexia
KW - Developmental prosopagnosia
KW - Face processing
KW - Lateralization
KW - Word processing
U2 - 10.1016/j.neuropsychologia.2022.108208
DO - 10.1016/j.neuropsychologia.2022.108208
M3 - Journal article
C2 - 35278463
VL - 170
JO - Neuropsychologia
JF - Neuropsychologia
SN - 0028-3932
M1 - 108208
ER -
ID: 299776998